Oopies Infotech Interview Questions and Answers

You have been given a number of stairs. Initially, you are at the 0th stair, and you need to reach the Nth stair. Each time you can either climb one step or two steps. You are...read more

You are given two arbitrary binary trees consisting of N and M number of nodes respectively, your task is to check whether the two trees are mirror of each other or not.

Two trees a...read more

You are given an infinite supply of coins of each of denominations D = {D0, D1, D2, D3, ...... Dn-1}. You need to figure out the total number of ways W, in which you can make a change fo...read more

You are given an array of integers NUM consisting of N elements. This array represents the digits of a number. Your task is to increase the number by 1, or we can say you have to add 1 to th...read more

Ninja has to design a 2 players game Tic-Tac-Toe played on an ‘N’ * ‘N’ grid.

Ninja has to assume the following rules while playing the game:

This game is played between two people (Player 1 a...read more

You have been given a column title as appears in an Excel sheet, return its corresponding column number.

For example:

A -> 1 B -> 2 C -> 3 ... Z -> 26 AA -> 27 AB -> 28 ... 

Input Format

The ...read more